Fan



g- 13, 1929- A. L. LAMBERT 1,724,604

FAN

Filed Feb. 5, 1926 Patented Aug. 13, 1929.

I 1324,64 FFHQ.

. ALBERT I. LAMBERT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 HEINTZMANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TION OFPENNSYLVANIA.

FAN.

Application filed. February This invention relates to fans, and moreparticularly relates to revolving fans of the type employed 011 motorvehicles to cause a strong draft of air through the radiator of theengine.

The principal object of my invention is to provide a fan which isespecially well suited for use in connection with radiators of internalcombustion engine cooling systems, to cause a strong draft of coolingair through the radiator, characterized by si1..- plicity, lightness,durability ad efficiency. A further object of my invention is to providea fan of the character described constructed of a very few number ofparts, which, in the main, comprise sheet metal stampings or pressings.A. further ob ject of my invention is to provide a fan built up of sheetmetal stampings or pressings, which require but little time and expenseto produce and which may be assembled readily, easily and inexpensively.Other objects of my invention will be in part obvious and in partpointed out hereinafter.

In accordance with my invention, I construct the fan of two similarsheet metal stampings and a hub. These stampings are exactly alike. Theyare disk-shaped, and are so formed that'the fan is completed by securingtwo of these stampings together fiatwise, one reversed with respect tothe other, and securing them to a suitable hub.

In order that a clearer understanding of my invention may be had,attention is hereby directed to the accompanying drawings, forming apart of this application and illustrating one possible embodiment of myinvention. Referring to the drawings, Fig. 1 is a front view of a fanembodying my invention; Fig. 2 is a sectional view thereof and is takenon the angular line 22 of Fig.

1, across the fan; and Fig. 3 is a sectional view thereof taken acrossthe blades on the angular line 33 of Fig. 1. Similar referencecharacters refer to similar parts throughout the several views of thedrawings.

Referring to the drawings, the fan consists of two similar sheet metalstampings or pressings 1 and 2 suitably secured to a hub 3, the hubpreferably being turned. Each of the stampings 1 and 2 supplies onetransverse half of the inner and outer rims and pulley groove of thefan. Each stamping also provides one-half of the number of 5, 1926.Serial No. 86,164.

blades. For instance, the pulley groove wall three of the blades, 6,rim, and an annular leg 8, which ends in an annular flange 9, whichseats against and 1S secured to the hub 3 on one side of the fan. Theother stamping 2, which is exactly the same as the stamping 1, exceptthat it has been turned'about and rotated with respect to stamping 1,supplies the other half 10 of the pulley groove 11, the other half 12 ofthe outer rim, the other three blades 13, the other half 14 of the innerrim, and has a similar annular leg portion 15, which ends stamping 1provides 4, outer rim side 5,

in an annular flange 16, which seats against.

and is secured to the hub 3 on the other side of the fan. The twosimilar stampings may be secured together very firmly and convenientlyby welding the outer and inner rim halves together. These sections mayalso be secured to the hub'very easily and securely by weldingtheflanges 9 and 16 thereto.

The hub 3 may be provided with aconvcntional threaded perforation 17 fora set screw, whereby the fan may be secured in place on a shaft or thelike.

The blades of the fan may be positioned atthe correct or desireddeflecting angle by the stamping operation. 7

It will be noted that the rims are of double thickness, but'that theblades are only of single thickness; thus lightness is secured in theblades, which do not need to bestructurally strong, and strength issecured at the rims and where the attachment is made to the hub, atwhich places strength and rigidity are desired. The blades beingintegral at both ends with the rim portions are firmly and securely heldin place.

From the aboveit will be apparent that a multitude of the stampings canbe made easily andquickly, andthat' it is a very simple matter to placeand secure two of these stampings together and attach ahub thereto toproduce a fan which is ready for use. The necessity of applying rims andblades as separate elements is entirely avoided. The blades serve asspokes between the rims. Thus the outer rim and pulley groove wall ofeach section is strengthened and braced at three I points equidistantlyspaced from each other. In a complete fan there are six such spokessupporting the pulley groove and outer rim.

half 7 of the inner As many changes could be made in the aboveconstruction and as many apparently widely different embodiments of thisinvention could be made without departing from the scope thereof, it isintended that all matter contained in the above description or shown inthe accompanying drawings shall be interpreted as illustrative and notin a limiting sense.

What I claim is 1. In a fan of the character described,circumferentially aligned blades and a twoply rim, some of the bladesbeing in one piece w th one ply of the rim and other blades being in onepiece with the other I ply of the rim.

2. In a fan of the character described, circumferentially aligned bladesand a twoply rim, alternate blades being in one piece with one ply ofthe rim and intermediate blades being in one piece with the other ply ofthe rim.

3. In a fan of the character described, circumferentially alignedblades, a two-ply rim at the ,outer ends of the blades, and a two-plyrim at the inner ends of the blades, some of the blades being in onepiece with one ply of each rim and other blades being in one piece withthe other ply of each rim.

4. In a fan of the character described, circumferentially alignedblades, a two-ply rim, some of the blades being in one piece with oneply of the rim and other blades being in one piece with the other ply ofthe rim, and a pulley groove wall integral with each ply of the rim.

5. In a fan of the character described, circumferentially alignedblades, a two-ply rim at the outer ends of the blades, a twoly rim atthe inner ends of the blades, some of the blades being in one piece withone ply of each rim and other blades being in one piece with the otherply of each rim, and an annular forked hub attachment portion, one forkof said portion being in one piece with one ply of the inner rim and theother fork of said attachment portion being in one piece with the otherply ,of said inner rim.

6. In a fan of the character described, circumferentially alignedblades, a two-ply rim at the outer ends of the blades, a twoply rim atthe inner ends of the blades, some of the blades being in one piece withone plyof each rim and other blades being in one piece with the otherply of each rim, an annular forked hub attachment portion, one fork ofsaid portion being in one piece with one ply of the inner rim and theother fork of said attachment portion being in one piece with the otherply of said inner rim, and a pulley groove, one wall of similardisk-shaped sheet metal each stamping including some of the fan bladescomplete, the blades of each section in circumferential alignment withthe blades of the other section.

8. A device for the purpose specified, which comprises a pair of sheetmetal wheel sections secured together back to back and which areprovided blades and with an'gularly flared flanges around theirperipheral edges, said flared flanges arranged to be matched together toform a circumferential pulley groove, the blades of each section beingin circumferential alignment with the blades of the other section.

9. A flywheel of sheet metal construction consisting of two identicalwheel sections and provided with pressed out complete fan blades, theblades of each section being in circumferential alignment with theblades of the other section.

10. A flywheel of sheet metal construction consisting of twoidenticalvwheel sections, each of which is provided with onepiecepressed out fan blades and a belt groove around the peripheral edge ofsaid wheel which is formed by cooperating rim portions of the sections,the blades of each section being in circumferential alignment with theblades of the other section.

11. A fan, comprising a pair of circular disks slotted from the centerout toward the periphery and distorted to provide integral fan bladeswhich provide a relatively great number of fan blades of relativelygreat width, the blades provided by each disk being in circumferentialalignment with the blades provided by the other disk 12. A fan,comprising a pair of circular disks that are cut from the center outtoward the periphery and the metal intervening between the cutsobliquely distorted while the metal of the two disks along the peripheryis flanged outwardly, two disks being fitted together with the distortedportions forming integral blades of relatively large width and the fansperipheral portion matched together to form a belt groove, the bladesformed by each disk being in circumferential alignment with the bladesformed by the other disk.

This specification signed this 3rd day of February, 1926.

ALBERT L. LAMBERT.v

with bent out complete the said

